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Finding the Fourth Proportional to 7,879.56, 11,811.24 and 2,681.52

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Solution

The fourth proportional to 7,879.56, 11,811.24 and 2,681.52 is: 4,019.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.56 : 11,811.24 = 2,681.52 : x
  2. Step 2: Convert to fraction form
    7,879.56/11,811.24 = 2,681.52/x
  3. Step 3: Cross multiply
    7,879.56x = 11,811.24 × 2,681.52
  4. Step 4: Simplify right side
    7,879.56x = 31,672,076.28
  5. Step 5: Solve for x
    x = 31,672,076.28/7,879.56
  6. Step 6: Final answer
    x = 4,019.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.